On Mon, 22 Mar 2010, Lars Levin wrote: > Date: Mon, 22 Mar 2010 09:31:49 +0100 > From: Lars Levin <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: [email protected] > Subject: [Emc-users] SSI Absolute encoders HM2 > > Hello group! > > I have servodrives with the ability to use them in SSI absolute encoder > mode. > Have been in contact with Peter Wallace at Mesa regarding support for > SSI > on their servoboards. > He mentioned that support for this was on a to do list, to be > implemented in the > Hostmot2 driver. Is this still on the to do list, or is there a working > driver?
Still no driver though the SSI HostMot2 firmware is there A simple test could be done using HostMot2s raw mode to check the interface Absolute encoder support may require some changes in EMC as well both for absolute/turn (what you likely have) and absolute/fullrange (like a Resolute linear encoder on an axis) > I am really interested in testing this on a gantry system and by using > SSI > getting rid of the homing problem in a gantry system, when the axes know > exactly where they are when you start up the system. > > How will the Mesa card be configured when you have two clock wires to > servo > and two data wires from servo, will it be possible to use 7i33 cards for > this? SSI Encoders are usually RS-422 so a 7I47 are other bidirectioanl differential interface would be needed, or you could use a 7I33 for input and use a inverter or RS-422 driver for the clock (theres a trick: if all SSI encoders are the same resolution, they can share a common clock) > > PS. I have just finished setting up a 3 axis servo retrofit on an old > Sajo mill > from 1947, and it runs smothly up to 5000mm/min. > Managed to modify and configure the HM2 files with great help from this > group, Thanks!!!!!! > Best Regards! > > Lars Levin > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
